Think he mean a K+Can Cable then hook it up to you car and laptop and remotely sort it via a program I know msn you could do stuff like this but been years since I have done it.
As for your post about the SOS button I live in Bristol cleared my fault with DR Gini with a K+Can cable but my error came back, so i'll try it again over the weekend, E93 incase your wondering what car my error is on.
So as I've read here this back up battery thing could be the solution.
No good clearing codes if they keep coming back, so you have to fix the fault.
A by pass in my opinion is not a solution. These cars have loads of electrics as you know, so I would stay clear of that route.
